Topic 4 - Movement Analysis

What are the correct components of a neuron?

• Axon, cell body, gland, dendrites, synape

• Axon, cell body, dendrites, synape, nerve

• Axon, cell body, nucleus, dendrites, synape

• Axon, calcium, dendrites, synape, nerve

Tags

NGSS.MS-LS1-3

Which is the correct sequence of neural impulse transmission to the muscle?

• cell body → dendrite → axon → motor end plate

• motor end plate → dendrite → axon → cell body

• dendrite → cell body → axon → motor end plate

• dendrite → axon → cell body → motor end plate

What is the neurotransmitter responsible for muscle contraction?

• Serotonin

• Dopamine

• Acetylecholine

• Cholinesterase

What describes the role of acetylcholine in skeletal muscle contraction?

• To open a motor-end plate channel

• To open an axon’s synaptic vesicle

• To close an axon’s synaptic vesicle

• To block a motor-end plate channel

What essential mineral is essential in the action of muscle contraction?

• Potassium

• Sodium

• Iron

• Calcium

What is cholinesterase?

• It's an enzyme

• It's a mineral

• It's a muscle type

• It's neurotransmitter

When actin is pulled past the myosin filament the..

• Sarcomere shortens

• Muscle shortens

• Z line shortens

• All of the above

What two protein molecules surround the actin filament?

• Sacroplasm and Retiuclum

• Mitochondria and Matrx

• Troponin and Tropomyosin

• Epimysium and Endomysium

What structural component separates each sarcomere?

• The M line

• The Z line

• The H Zone

• The A Zone

What is depolarization in muscle contraction?

• When the myosin head pulls on the actin

• When channels open in a nerve terminal

• When calcium binds to troponin causing tropomyosin to change it's shape

• When muscle cells become fatigued